346 results about "Yaw system" patented technology

The invention discloses a matrix yaw system of a wind power plant. The matrix yaw system comprises a data acquisition module, a wind plant modeling module, a parameter extraction module and a yaw control module. The data acquisition module acquires a wind field original data set containing three-dimensional space coordinates and timestamps by using a multi-source sensor; the wind field modeling module calculates correlation between points by combining a covariance function through a Gaussian process regression algorithm, and constructs a three-dimensional dynamic wind field model; the parameter extraction module is used for extracting wind regime parameter vectors in the model by adopting a nearest neighbor interpolation algorithm on the basis of actual space coordinates of a fan; and the yaw control module utilizes a depth deterministic strategy gradient reinforcement learning model to generate a yaw angle adjustment instruction in combination with the wind regime parameter vector, the current yaw state of the fan and a preset maximum cumulative reward function. Through multi-module cooperation and intelligent algorithm optimization, accurate matching of wind field dynamic modeling and yaw control is achieved, and the energy efficiency and operation stability of the wind generating set are improved.

Systems, methods, and computer program products for controlling a yaw system of a wind turbine. The yaw system includes mechanical brakes that provide a first amount of braking torque when closed. The yaw system is configured to transition from a yawing state to a parked by brake state by closing mechanical brakes in a first subset of the mechanical brakes and opening each mechanical brake in a second subset of the mechanical brakes. The second subset provides a second amount of braking torque that is less than the first amount of braking torque. In response to detecting a rotation of the nacelle while in the parked by brake state, the yaw system is configured to transition from the parked by brake state to a parked by motor state in which yaw drives are activated to provide a counter acting torque in opposition to the detected rotation of the nacelle.

The invention discloses a wind turbine generator fault diagnosis method and system based on a fractional order neural network. The method comprises the following steps: S1, converting a preprocessed original yaw system audio signal into time domain data, frequency domain data and sound spectrum data; s2, establishing a parallel multi-mode dense connection convolutional network, and capturing transient or periodic features of the fault from three dimensions; s3, performing feature fusion on the yaw abnormal sound fault features captured in different dimensions; s4, performing parallel multi-modal dense connection network model training and performance optimization by adopting a momentum fractional order optimization technology, and constructing a fractional order-multi-modal dense connection convolutional network; s5, continuously adjusting the weight and parameters of the model, and outputting a yaw abnormal sound fault diagnosis result of the wind turbine generator; the beneficial effects of the invention are that the method extracts and analyzes the data features of sound signals in different modes, proposes a fractional order-multi-mode dense connection convolution network, and carries out the accurate abnormal sound fault diagnosis through the small sample data.

The invention discloses a yaw wind error compensation method and system based on wind measurement data, and relates to the technical field of wind power generation equipment control, and the method comprises the steps: setting a wind measurement point position, and collecting an original wind field data set; calculating an incoming flow and a cabin wind direction angle according to the original wind field data set; performing deviation calculation to obtain a yaw wind error angle; triggering a dual-channel compensation module, accumulating errors, constructing an error queue, and performing batch compensation to obtain a compensation result; yawing control parameters are called, the cabin attitude is analyzed according to the compensation result, the yawing control parameters are updated, and self-adaptive compensation of yawing to the wind error is achieved. The technical problems that in the operation process of the wind driven generator, due to wake flow, terrain, turbulent flow and other environmental factors and equipment loss, a traditional yaw system cannot accurately detect the wind direction and compensate the wind alignment error, the power generation efficiency is low, and the potential safety hazard of equipment is large are solved, and the purposes of accurately improving the wind alignment precision of a wind wheel and improving the power generation efficiency are achieved. The power generation efficiency is obviously improved; and the equipment operation safety is enhanced.

The invention relates to a wind generating set, in particular to a yaw braking device which comprises a braking device body arranged on a rack, the braking device body comprises a braking assembly and a driving assembly, and the driving assembly can drive the braking assembly to approach a tower drum flange so as to abut against the inner wall of the tower drum flange. According to the yaw braking device, by arranging the braking device, the braking assembly abuts against the tower drum flange, the situation that the braking effect is poor due to the fact that the yaw friction coefficient is reduced due to carbon powder accumulation is avoided, and the yaw braking effect and safety are improved.

The present invention discloses a method, system, medium and device for eliminating the vortex-induced vibration of fan blades. This method adds a strategy for eliminating vortex-induced vibration to the main control program of the fan through the PLC main controller, and can eliminate the vortex-induced vibration of the fan blades when the fan is not powered off and in a shutdown state. If the main control program detects that the fan needs to execute the strategy for eliminating vortex-induced vibration, it controls the pitch system of the fan to execute the pitch vibration elimination strategy in the strategy for eliminating vortex-induced vibration; if the pitch vibration elimination strategy fails to execute, the main control program controls the yaw system of the fan to execute the yaw vibration elimination strategy in the strategy for eliminating vortex-induced vibration, and finally successfully makes the wind speed and vibration value of the fan meet the preset conditions, eliminating the vortex-induced vibration to protect the safety of the fan blades; the present invention can control the fan to execute pitch or yaw vibration elimination actions in the non-powered-off shutdown state of the fan, so as to destroy the periodicity of vortex shedding, suppress the increase of vibration, achieve the purpose of eliminating vortex-induced vibration, and protect the safety of the fan blades.

The invention provides a wind turbine generator yaw control method and system based on turbulence intensity and an operation mode. The method comprises the steps that the turbulence intensity of the position where a to-be-controlled wind turbine generator is located and the operation mode of the wind turbine generator are obtained; determining whether to start a yaw system based on the turbulence intensity; when the turbulence intensity is larger than the turbulence intensity threshold value, the yaw system is closed, and when the turbulence intensity is smaller than or equal to the turbulence intensity threshold value, if the operation mode of the wind generating set is a fan starting mode or a grid-connected operation mode, a first yaw control strategy is selected to conduct yaw control over the wind generating set, if the operation mode of the wind generating set is the standby mode, selecting a second yaw control strategy to perform yaw control on the wind generating set; wherein the operation modes of the wind generating set comprise a wind waiting mode, a fan starting mode and a grid-connected operation mode. According to the technical scheme provided by the invention, the yaw system structure can be effectively protected in an area with high turbulence intensity and fast wind direction change.

A method of operating a wind turbine, the wind turbine comprising a rotor and a yaw system, the yaw system comprising: a yaw ring and a pinion engaging the yaw ring. The method comprises: a) operating the yaw system to yaw the rotor in response to wind direction changes, thereby changing a rotor yaw direction; b) identifying a location of a damaged or missing tooth of the yaw ring; c) based on the identified location of the damaged or missing tooth and the location of the pinion, determining a safe sector and a restricted sector, wherein the pinion coincides with the location of the damaged or missing tooth when the rotor yaw direction is in the restricted sector; d) generating power with the rotor when the rotor yaw direction is in the safe sector; and e) disabling or otherwise modifying the operation of the wind turbine to substantially avoid generation of power by the rotor with the rotor yaw direction in the restricted sector.

The wind driven generator with the blade reversing function comprises an installation frame, a speed increaser and a generator set, the speed increaser and the generator set are installed on the top of the installation frame, the generator set is in rigid connection with the speed increaser through a rotating shaft, an input shaft of the speed increaser is connected with a synchronizing shaft, and the synchronizing shaft is rotationally connected with a sleeve. An Archimedes spiral fan blade set is fixedly installed on the sleeve, a processor is fixedly installed on the installation frame, a connecting assembly is installed on the synchronizing shaft, an air supply assembly is arranged on the top of the installation frame, and the connecting assembly and the air supply assembly are both in signal connection with the processor. In the aspects of wind energy capture and power generation, the Archimedes spiral fan blade set is special in shape and can be started at low wind speed, and the wind energy utilization range is widened. The special spiral structure can automatically face wind, a complex yaw system is not needed, the cost is reduced, and stable and efficient power generation can be achieved at the position with the complex wind direction.

The invention relates to the technical field of wind generating set yaw system lubrication, in particular to a wind generating set yaw gear partition lubrication method which comprises the steps that area division is conducted, specifically, the working face of a yaw gear is evenly divided into an upper independent lubrication area, a middle independent lubrication area and a lower independent lubrication area in the axial direction; performing exposure detection; grading judgment: judging whether an oil outlet hole of the grease injection pinion needs to be blocked or not for the exposed area based on the exposed area proportion and a preset judgment threshold value, and determining the area needing to be blocked; for the non-exposed area, the lubricating grease covering thickness is detected through thickness detection equipment, the film thickness proportion is calculated, and the area needing to be plugged and the number needing to be plugged are determined according to the film thickness difference proportion; and executing the operation. According to the invention, through dynamic plugging of the oil outlet holes, precise regulation and control of the lubrication amount in the tooth width direction are realized, so that the lubrication uniformity is improved, and waste and pollution caused by accumulation of grease on the lower side are reduced.

A wind turbine comprising a tower, a nacelle mounted rotatably on the tower via a yaw system and a hub carrying one or more wind turbine blades is disclosed. The wind turbine further comprises a generator, an AC / DC converter connected to the generator and an electrolysis system connected to a DC power output of the AC / DC converter for producing hydrogen. The electrolysis system is arranged in an up-tower part of the wind turbine, e.g. in the nacelle. The wind turbine further comprises a hydrogen transport line connected to the electrolysis system for transporting hydrogen produced by the electrolysis system away from the electrolysis system, the hydrogen transport line extending along an exterior surface of the tower from the position of the electrolysis system to a lower part of the tower.

The invention provides a yaw anomaly detection method, device, equipment and medium for a wind driven generator, and the method comprises the steps: collecting sensor parameters of the wind driven generator in real time, and carrying out the preprocessing of the sensor parameters as operation data; building a digital twinborn model, namely building a physical model of a yaw system based on a mechanical structure, a dynamic principle and an electrical characteristic of the wind driven generator, and building a data driving model by adopting machine learning and deep learning algorithms based on operation data of the wind driven generator; using the trained machine learning model to classify and predict the operation data; inputting the operation data into the digital twinborn model to simulate the actual operation state of the wind turbine generator, obtaining a predicted value, comparing the predicted value with an actual measurement value, and when an error exceeds a preset threshold value, detecting that the wind turbine generator has yaw abnormity, the problem that the service life of equipment is damaged due to the fact that a wind turbine generator yaw control system cannot accurately obtain the real operation state of a yaw system of a wind turbine generator is solved.

The invention relates to the technical field of new energy, and discloses an optimization method for an intelligent yaw system of a wind generating set, and the method comprises the steps: building the intelligent yaw system, enabling the system to be internally provided with seven modules, and enabling a multi-sensor data collection module to collect wind direction, wind speed and yaw angle data in real time, the data fusion module performs Kalman filtering fusion processing to obtain a high-confidence state estimation value, the intelligent decision output module generates an optimal yaw control instruction by adopting a multi-mode control strategy and a parameter self-adaptive mechanism based on fused data, an execution mechanism is driven to realize accurate wind alignment, and the system integrated hardware-in-the-loop test module is used for realizing accurate wind alignment. Omnibearing verification can be carried out before deployment, after actual operation, operation indexes are continuously monitored through the performance evaluation module, control parameters and fusion algorithm parameters are adjusted online through the optimization module on the basis of methods such as machine learning, closed-loop optimization is formed, finally, yaw precision, response speed and system stability are remarkably improved, and maintenance cost is reduced.

The present invention discloses a yaw control method and system based on meteorological data, including: acquiring first environmental data around a first object; predicting first characteristic data in the first environmental data according to the first environmental data; generating a first control target according to the first characteristic data; and using the first control target to generate a control instruction to control the first object. By combining meteorological data prediction and the dynamic response characteristics of the wind turbine, accurate yaw control instructions can be generated in real time, significantly improving the wind turbine's ability to capture the dominant wind direction and improving power generation efficiency. At the same time, the optimized control strategy effectively reduces the mechanical load and energy consumption of the yaw system and extends the service life of the equipment. Under extreme weather conditions, the present invention has higher stability and safety, avoids equipment wear caused by overly fast or over-frequency adjustments, and further improves the reliability and economic benefits of the wind power generation system.

The invention relates to the technical field of mechanical fault diagnosis and signal processing analysis, in particular to a yaw speed reducer monitoring and diagnosis method for dealing with intermittency and variable working conditions, which comprises the following steps: S1, acquiring a vibration signal of a yaw speed reducer of a wind turbine generator; s2, according to the amplitude difference of the vibration signals in the action period and the non-action period of the yaw speed reducer; s3, the identified effective vibration signals are amplitude-modulated and frequency-modulated signals, and rotating speed information is estimated by adopting a ridge extraction method based on a cost function; s4, integrating the estimated rotating speed and the identified effective vibration signal; s5, calculating the theoretical fault feature order of each component according to the structural parameters of the speed reducer; according to the method, the adverse effect of intermittent action of the yaw system on data acquisition, storage and monitoring diagnosis is overcome, the feature order corresponding to the fault type is accurately represented, and the adverse effect of the time-varying operation condition of the yaw speed reducer on fault feature extraction and recognition is avoided.

The utility model discloses a yaw system simulation test bench with multi-degree-of-freedom loading, which comprises a bottom platform, a base, a rotating device, a load transmission device, a yaw system, two axial hydraulic loading devices, a radial hydraulic loading device and a control system, the load transmission device is supported on the bottom platform through the two axial hydraulic loading devices, an upper-layer yaw brake of the yaw system is fixed to the bottom of the load transmission device, a lower-layer yaw brake of the yaw system is fixed to the top of the base, and the rotating device is arranged between the load transmission device and the base. The radial hydraulic loading device is fixed to the bottom platform and makes contact with the peripheral face of the rotating device in an attached mode, and the control system is electrically connected with the yaw system, the two axial hydraulic loading devices and the radial hydraulic loading device. According to the utility model, the test reliability of the yaw system of the wind turbine generator can be effectively improved.

The invention relates to the technical field of wind driven generators, and discloses a wind generating set yaw system twisted cable protection device and method.The device comprises a tower barrel and a twisted cable and further comprises supporting frames fixed to the two sides of the tower barrel, and limiting frames are fixedly connected between the opposite sides of the two supporting frames correspondingly; connecting plates are arranged between the opposite sides of the two limiting frames correspondingly, fixing plates are fixedly connected to the front side and the rear side of one side of each connecting plate correspondingly, and dampers are fixedly connected between the opposite sides of the two fixing plates correspondingly. Limiting holes in positioning rings penetrate into an annular protection shell, when a twisted cable shakes slightly, the twisted cable can abut against two protection rings in the annular protection shell, the protection rings are stressed to drive limiting rods and enable the limiting rings to stretch second springs to protect the twisted cable, a certain amount of space is stored in a limiting space, and therefore the twisted cable can be protected. Therefore, the cable is ensured not to be fixed at a certain position by strong force, and damage caused by friction and torsion concentration is reduced.

The present disclosure relates to a method (100) for operating a yaw sytem of a wind turbine (10), the yaw system comprising a yaw bearing (98), an annular gear (31) and a plurality of yaw drives (35) including a motor (33) with a motor brake (91), a gearbox (37) and a pinion (39) operatively connected with the motor (33). The method (100) comprises operating the plurality of yaw drives (35) to rotate a nacelle (16) with respect to a tower (15) of the wind turbine (10). The method further comprises stopping rotation of the nacelle (16) with respect to the tower (15), including closing the motor brakes (91) of the yaw drives (35). Furthermore, the method (100) comprises, after a waiting time, balancing loads experienced by the plurality of yaw drives (35) of the yaw system. The present disclosure also relates to a control system (92) for a wind turbine (10) that is configured to carry out such method (100).

The invention discloses a fan yaw gear cleaning device, and relates to the technical field of fan yaw gear cleaning, the fan yaw gear cleaning device comprises a cabin unit, and the cabin unit comprises a cabin, a fluted disc, a tower drum and a driving part; the cleaning unit comprises a mounting ring, a monitoring assembly, a connecting assembly and a cleaning assembly. According to the yaw gear cleaning device, the cleaning efficiency and reliability of the yaw gear are remarkably improved through elastic coupling transmission and a self-adaptive attaching structure of the cleaning unit. When the yaw system operates, the scraper piece is synchronously driven to move. The rack of the scraper piece and the sliding plate achieve elastic reset through the spring, it is guaranteed that the scraper is attached to the tooth groove all the time, clean contact can be maintained even under the condition that the tooth face inclines or oil dirt is accumulated, and insufficient scraping force or local overload is avoided. In addition, the arc-shaped flow guide design of the arc plate is matched with tooth grooves of the fluted disc, a closed waste collecting cavity is formed, waste diffusion in the cleaning process is effectively prevented, and the collecting efficiency is improved.

The invention discloses a fan yaw automatic correction method and device based on static and dynamic deviation coupling. The fan yaw automatic correction method comprises the steps that historical operation data of a fan SCADA system is read within a preset time period; working condition segmentation is carried out on the operation data, and shutdown, power limiting, full power generation and climbing working conditions are identified; dividing the climbing working condition data into bins according to wind facing angle intervals, constructing wind speed-power curves of all the intervals, and comparing curve areas; performing yaw deviation quantitative analysis on the climbing condition data; wind direction signals of an existing ultrasonic anemorumbometer and a newly-added mechanical anemorumbometer of the fan are collected, and the mean value of the two wind direction signals is taken as a dynamic reference wind direction; and coupling the target yaw deviation angle with the dynamic reference wind direction to generate a corrected wind direction value, converting the corrected wind direction value into an analog current signal, outputting the analog current signal to a DCS (Distributed Control System), and driving a fan yaw system to automatically execute wind correction. According to the invention, through dual-sensor data fusion and comprehensive quantitative modeling of static and dynamic deviation, the wind facing precision and the power generation efficiency of the wind turbine are improved.

The invention discloses a wind driven generator braking method and system, and relates to the technical field of wind driven generators, and the method comprises the steps: carrying out the data collection of a wind power plant, and obtaining a wind speed data set, a rotating speed data set and an included angle data set; analyzing the wind speed data set, the rotating speed data set and the included angle data set to obtain an interaction relationship; acquiring current wind speed data and determining a current wind speed grade; if the current wind speed grade is the first grade, the braking system is adjusted based on the current wind speed data and the interaction relation; if the current wind speed grade is a second grade, the adjusting amount of the braking system is judged based on the current included angle data, the current wind speed data, the yaw adjusting rate and the interaction relation, and second adjusting amount data is obtained; and if the current wind speed grade is the third grade, the wind wheel direction of the wind motor is adjusted based on the yaw system, and brake system starting is conducted on the wind motor with the rotating speed being 0. The brake component has the effect of reducing the abrasion rate of the brake component.

The invention discloses an emergency yaw control method, device and equipment for the out-of-control rotating speed of a wind turbine generator and a medium. The emergency yaw control method comprises the steps that real-time operation data of the wind turbine generator are obtained; determining a predicted operation state of the wind turbine generator according to the operation data of the wind turbine generator; if the emergency yaw is triggered, acquiring real-time environment data, and determining a target yaw angle according to the real-time environment data; according to the current yaw angle and the brake temperature data, the yaw speed is dynamically adjusted, and an emergency yaw system of the wind turbine generator set is controlled to output a control signal at the dynamically adjusted yaw speed till the target yaw angle is reached. The invention belongs to the field of wind turbine generators. The yaw speed can be adjusted in real time, the energy consumption of a hydraulic system is reduced, and the overall energy utilization efficiency is improved.

The invention provides a dynamic yaw error compensation method and system based on a cabin type wind lidar. The method comprises the following steps: firstly, acquiring three-dimensional wind field data at a preset distance in front of a wind turbine, simultaneously acquiring operation state parameters of the wind turbine, then extracting unstable transverse component and longitudinal velocity gradient distribution in an incoming wind flow direction, and then calculating a real-time yaw error amount caused by dynamic change of a wind field; and converting the real-time yaw error amount into a feed-forward compensation control signal by combining the dynamic response characteristic of the yaw system of the wind turbine, finally inputting the feed-forward compensation control signal into a main controller of the wind turbine, and adjusting an angle set value of the yaw system so as to complete yaw error compensation of the laser radar. According to the technical scheme, the alignment precision, the wind energy capturing efficiency and the operation stability of the wind generating set under the complex changing wind condition are improved, and high-precision and high-reliability compensation of the dynamic yaw error is achieved.

The invention provides a fault early warning method and device for a yaw system of a wind power generator set, and the method comprises the steps: monitoring the real-time data of the yaw system of the wind power generator set, the real-time data comprises effective output power and incoming flow wind speed, and the incoming flow wind speed comprises the average incoming flow wind speed at the effective output power and the average incoming flow wind speed at the rated power; inputting the effective output power, the average incoming flow wind speed at the effective output power and the average incoming flow wind speed at the rated power to a pre-constructed fault recognition model, and outputting a fault recognition result; based on the fault identification result, performing fault early warning; the early warning is carried out through the fault identification model, so that the timeliness of fault early warning is effectively ensured, corresponding prevention and maintenance can be adopted in the fault incubation period, the safety of the yaw system is ensured, and the fault early warning model is determined by various data, so that the accuracy of fault early warning is further improved.

The invention relates to the technical field of wind driven generator fault prediction, in particular to a wind driven generator fault prediction system based on machine learning, and the system comprises a deviation data detection module which determines the wind facing accuracy of a wind driven generator and outputs a deviation data detection result; the deviation change trend analysis module is used for identifying a deviation change development trend and predicting a future deviation increase condition; the equipment real-time data acquisition and synchronization module is used for acquiring equipment real-time data related to the yaw system; and the equipment and deviation relation analysis module is used for generating an equipment fault judgment result and judging specific equipment or parts causing small-amplitude deviation. According to the method, multi-level equipment data analysis is carried out, specific equipment causing deviation is deeply analyzed, a fault source is accurately positioned, it is ensured that the working state of a yaw system is rapidly adjusted, deviation is prevented from being further aggravated, it is ensured that the wind driven generator always keeps the optimal matching degree with the wind direction, the power generation efficiency is improved, and energy loss caused by deviation is reduced.

The utility model provides a yaw electromagnetic damping device and a yaw system of a wind generating set, the yaw electromagnetic damping device comprises: an electromagnet arranged on one of a tower drum and a main frame; the magnetic matching piece is arranged on the other one of the tower drum and the main rack, and the electromagnet and the magnetic matching piece can form magnetic attraction and / or repulsion in a power-on state; the power supply device is electrically connected with the electromagnet and can provide current for the electromagnet; and the control device is in signal connection with the power supply device and can control the output current of the power supply device. According to the yaw electromagnetic damping device provided by the embodiment of the invention, hydraulic oil leakage and dust cannot be generated, and environmental protection is facilitated; the friction plate or the sliding pad does not need to be replaced in the life cycle of the unit, so that the workload of the maintenance personnel is reduced, and the operation and maintenance cost is reduced; damage to the large yaw gear ring and the yaw motor can be reduced, and consumption of spare parts of a unit is reduced.

The application discloses a kind of wind turbine yaw system electromagnetic brake online monitoring method, comprising the following steps: S1, the current data of electromagnetic brake output in the automatic yaw operation process of wind turbine is collected;S2, in the preset acquisition module of wind turbine nacelle control cabinet, the current data collected is transmitted to the computing device in the tower base of wind turbine by acquisition module;S3, the current data is analyzed in real time by the internal program of computing device, and the deviation degree of electromagnetic brake current is calculated, the running state of wind turbine yaw system electromagnetic brake is judged according to the deviation degree, and the running state is fed back to the main control of wind turbine;The application can monitor the health status of yaw system in real time online, ensure that unit safe and stable operation, find electromagnetic brake action failure condition in advance, effectively reduce the replacement maintenance cost caused by yaw subcomponent damage, and avoid long stop risk caused by unit maintenance process.

This utility model relates to the field of wind power yaw technology and discloses a waste oil collection device for the maintenance of a wind turbine yaw system. The device includes a yaw main wheel and a track component. The track component includes a calibration plate with a fixing groove at the top. A fixing component is inserted into the inner wall of the fixing groove, and a snap-fit ​​component is fixed to the bottom of the inner wall of the fixing groove. A snap-fit ​​groove is formed at the bottom of the fixing component, and the inner wall of the snap-fit ​​groove is snap-fitted to the surface of the snap-fit ​​component. A sloping shovel is fixed to the side of the fixing component away from the calibration plate, and a backhoe is fixed to the side of the sloping shovel closer to the bottom of the calibration plate. This utility model secures the fixing component to the fixing groove of the calibration plate, ensuring that the bottom of the sloping shovel and the backhoe are tightly fitted to the top of the calibration plate. Thus, during the forward rotation of the yaw main wheel, the sludge on the inner wall of the yaw main wheel is scooped up by the sloping shovel, and the backhoe similarly scoops up the sludge during the reverse rotation. Workers only need to clean the sloping shovel and backhoe periodically.

The present invention belongs to the technical field of maintenance of the wind turbine yaw system, and discloses an auxiliary device for repairing the wind turbine yaw brake disc, including a rotating table. A first motor is fixedly connected to the middle of the interior of the rotating table. Both the left and right sides of the first motor are fixedly connected with rotating rods. The other sides of the rotating rods are respectively hinged with movable rods. The other sides of the movable rods are hinged with connecting rods. A grinding device is hinged to the top of the connecting rod. Through the cooperation of structures such as the first motor, the rotating rods, the movable rods, the connecting rods, and the grinding device, the device is convenient for removing rust from nuts. The first motor drives the rotating rods to rotate, the rotating rods drive the movable rods, the movable rods can first drive the connecting rods to jack up, then the movable rods drive the connecting rods to move downward, the connecting rods drive the movable pipes to move downward, and the movable pipes can drive the grinding plates to reciprocate up and down through the limiting columns, so as to remove rust and polish the surface of the nuts.

The invention relates to a wind turbine generator yaw system control method based on optimal parameters of an active disturbance rejection controller, and belongs to the field of wind turbine generator control. An active-disturbance-rejection controller is introduced to control a wind turbine generator yaw system, and the method comprises the steps that control parameters of the active-disturbance-rejection controller for the wind turbine generator yaw system are determined, a sparrow algorithm is adopted to optimize the parameters of the active-disturbance-rejection controller, and the optimal parameters of the active-disturbance-rejection controller are determined; the real-time yaw speed is collected through a data collecting device, the difference value of the target yaw speed and the real-time yaw speed serves as a control signal to be input into a tracking differentiator, and wind control over a yaw system is conducted; the real-time yaw speed serves as input of an expansion state controller in the active disturbance rejection controller, and wind control of the yaw system is carried out; and according to an observation result of the expansion state observer on yaw speed fluctuation, compensation is carried out by utilizing nonlinear state error feedback. The yaw system can be controlled under the high wind speed and high turbulence intensity, and meanwhile the load of the yaw bearing is reduced.